使用MemoryUsage获得主机内存信息问题

[一直不想成为程序猿]

我是使用restful 获得json串，转成MemoryUsage对象是报错
org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: No suitable constructor found for type [simple type, class java.lang.management.MemoryUsage]: can not instantiate from JSON object (missing default constructor or creator, or perhaps need to add/enable type information?)

这个是MemoryUsage对象中没有无参构造器造成的，但这个类是jvm的jar啊，我该怎么解决啊。。

转换代码如下：
public void checkHealth(){
final String uri = "http://localhost:8080/health";

RestTemplate restTemplate = new RestTemplate();
HealthStatistics result = restTemplate.getForObject(uri, HealthStatistics.class);

System.out.println(result);
}

在线等